ΔE 13.2, fair: the same colour family, but not a straight swap. Sanctuary Red is more muted, cooler than Red Truth.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Sanctuary Red is more muted, cooler than Red Truth.
The same difference applies the other way round: Red Truth is more saturated, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Red Truth on the colour wheel See Sanctuary Red on the colour wheel
All matches: Red Truth equivalents · Sanctuary Red equivalents